Carriage and bucket for inclinable booms



April 15, 1952 R. F. I INDowv 2,593,322

CARRIAGE AND BUCKET FOR INCLINABLE BOOMS y s a s 68 ill. RUDOLPH F. L//voow a INVENTOR. f1 fi s j BY %M hun? ArroRNEy April`15, 1952 R. F. LINDow CARRIAGE AND BUCKET FOR INCLINABLE BOOMS i 3 Sheets-Sheet 2 Filed May 2, 1946 ffl/00L PH E y L /IVW IN V EN TOR.

BY ATTORNEY April 15, 1952 Rl F, LlNDOw 2,593,322

CARRIAGE AND BUCKET FOR INCLINABLE BOOMS Filed may 2. 194e 3 sheets-sheet s Figo 3.,

2 RUDOLPH F. L//voW IN V EN TOR.

ATTORNEY Patented Apr. 15, 1952 UNITED STATES PATENT OFFICE Rudolph F. Lindow, Wauwatosa, Wis., assigner to Chain Belt Company, Milwaukee, Wis., a corporation of Wisconsin Application 'May 2, 1946, serial No. 666,659

5 claims. (ci. 214-59) This invention relates to improvements in a bucket and carri-age for an inclinable boom used with a paving or concrete mixing machine. invention enables a paver to be adapted to divers conditions and usages with far greater flexibility than was heretofore possible. The invention also permits the automatic leveling and stabilizing of a concrete carrying bucket associated with a boom, regardless of the angle to which the boom may be inclined. Also the tripping mechanism which opens and closes the discharge door of the bucket is operable in any position of the boom without changes necessitating strenuous efforts; actually the adjustment is effortless.

The use of an inclined boom has enhanced the value of a paving machine greatly. One of these advantages is at once apparentl when a paving machine is operated onarticulated terrain where the boom is adjusted to accommodate the rise and fall of the terrain. Another use is greatly appreciated in the construction'of buildings and other like structures, for a paver with such a boom and bucketcan be used to deliver mixed concrete to elevated structures which could only be otherwise reached by expensive elevator systems.

Prior attempts to provide an inclinable boom and the bucket used therewith have resulted in cumbersome structures. These structures also have the disadvantage of necessitating arduous labor for `the change-over in the suspension of the bucket from one position of the boom to the next.. For, in any given position the attachinent of the bucket tothe boom was ilxed. These disadvantages have sometimes outweighed the commercial feasibility of such a paving machine. Itis the object of this invention to provide a readily adjustable bucket which will conform to inclinations of a boom.

Another object of the invention is to provide for an inclinable boom, a self-conformable bucket and mounting thereon. 1

It is also an `object of this invention to provide a conformable door operating mechanism for a bucket which is 4constructed to handle concrete and similar materials.

Another object of this invention is to provide astabilizd conformable bucket and carriage for an* inclinable boom.

.Still another object of the invention is to provide a carriage and bucket of simple structure reign inelinablebocm. 4 4 n V `'Iflie invention is thought to b best illustrated in velectd embodiment shown in the follow- Fig'. l is a side elevation of a crawler ty-pe paving' machine with its boom and bucket in the horizontal position, shown in full lines and its boom and bucket in an inclined position shown in broken lines;

Fig. 2 is a side elevation of the carriage and concrete distributing bucket mounted on a boom which is inclined. The full lines show the bucket with its door in the closed position, and the broken lines show its door in the open position;

Fig. 3 is an end view of the boom and carriage shown in Fig. 1;

, Fig. 4` is a sectional view of the tripping device taken along the lines 4-4 of Fig. 3;

Fig. 5 is a sectional View of the stabilizing means; and

Fig'. 6 is a sectional View of another form of the stabilizing means.

Referring to the drawings, and particularly to Fig. l, it will be noted that the paving machine 2U is of conventional form and is well known in the art-` Attached thereto is a boom 23, said ment relative to the horizontal and vertical, and

the supporting pivot 2| is rotatably mounted for lateral movement of the boom. Mounted on the boom `23 is the carriage 22. The carriage traverses the boom by means of the rollers 25 which engage ledges on the boom on either side thereof. Connected to the rollers 25 are the side plates Iiwhich are rigidly connected to the shafts 21 and 42 thus forming a stable structure capable of traversing the boom. The cable 28 is connected to the carriage atf29, and this supplies the traver'sing means along with the cable 30.

APivotally suspended from the carriage 22 is the bucket for containing concrete 3|. This is mounted to the carriage by means of the straps 32 which are rotatably mounted on the shaft 2l to permit the free movement of the bucket. The bucket has a pivotal discharge door 311*y `lorrated at the bottom thereof. It further has door actuating means 34 which consists of a linkage of levers, an arm 35, a toggle 35, a bell crank 31, the rod 38 and lever 39. The lever arm 39 is secured to `a sleeve 63 the function of which will be subsequently described. v p

The bucket 3| is stabilized by means of a hydraulic stabilizer 4G, it is pivotally attached to l the bucket on the rod 4I and pivotally attached sleeve 43 is rotatable, but substantially axially fixed. Its inner face 44 is serrated or jaw-like, and this face is also counterbored to form a recess 45 to engage the spring 46. Adjacent to the sleeve 43 is a similar sleeve 41. The face 44 is serrated or jaw-like, matching the face 44 that it might engage therewith. This face is also counterbored to receive the spring 46. The spring bears against the two sleeves and this action keeps the two jaws disengaged when the bucket door is not operated. Mounted on sleeve 41 is a lever arm 48 on which is rotatably mounted a roller 49; this is for engagement with the cam members 50 and 5l mounted onthe boom 23. The lever 48 may also be motivated by other means, such as a tag line.

One end of the sleeve 41 has a cam surface 52.l

This is for engagement with a similar surface 53 on one face of the sleeve 54. These cam surfaces are hardened by known processes to minimize wear 'and are shown apart from each other for purposes of illustration; actually they bear senected to said piston. Connecting means 14 is attached to the piston shaft. The piston 12 is so disposed within the cylinder 1U so as to form two compartments and 16 which are in hydraulic communication by means of piping 11. In

f communication with the piping 11 is a manually curely on each other. As the lever 48 is rotated,

thesleeve 41 is axially displaced toward the sleeve 43. This is by action of'the two cams 52 and 53l oneach other. The sleeve 54 is nonrotatable. However, it is resiliently mounted by means of the springs 55; this is necessary for in the event the jaws of sle-eves 41 and 43 should not mesh, the sleeves will yield so as not to unduly strain the structure of the jaws and carriage 26. The combined effort of resistance of the springs 55 is considerably greater than the separating force exerted by the spring 46 so that the sleeve 41 will beforced into engagement with the sleeve 43 when it is rotated.

It will be noted that when the' lever 48 is rotated in a counterclockwise direction (see Fig. 2) the lever mechanism is actuated to close the door 33 and throw the toggle 36 over center to lock said door. As the carriage is drawn up along the boom the lever and roller mounted thereon engages the cam 58 which rotates the said lever in a clockwise direction actuating the linkage system to throw the toggle 36 over center and further to cause the opening ofl the door 33; When the bucket returns to loading position at the inner end of the boom, the roller 49 strikes the cam 5|, which closes the door.

From the foregoing it will be observed that the roller 49 constitutes tripping means which will always be in position, regardless of the angle of boom inclination, to engage the cam trips 56 and 5I and to cause the proper action of the bucket door; the bucket however may be maintained in horizontal position by pivoting relative to its carriage since the sleeve 43 may rotate independently of the sleeve 41.

Referring to Fig. 5 it will be noted that it is a Sectional view Yof the stabilizing means 40. It comprises a cylinder 62, a connecting member 63 on the cylinder, and a piston 64 connected to a shaft 65 extending within the cylinder. A connecting means 66 is mounted on one end of the shaft 65. The shaft 65 has a packing 61 to retain the iluid'68 which fills theucylinder. In the lpiston 64 are several small holes 69. These per'- mit the iluid 68 which is substantially incom pressible to pass from one compartment to the other, thus varying the distance between the two holding means 63 and 66. Thus it is apparent that Awhen the bucket 3| is pivoted about the shaft 21 the stabilizing means 48 will readily conform to such movement as the stabilizing means may be vslowly extended or contracted.

operated valve 18, and in both compartments and also in the communication system there is an incompressible fluid 69 such as conventional hydraulic oil. It will b e understood that as the valve 16 is operated permitting fluid under pressure to flow fromcompartment 15 to compartment 16 the distance between the centers of the connectingpoints 1I and 14 is increased, or the converse may be done. The use of this adjustable stabilizing means has some advantages in that it permits more rapid leveling of the bucket 3l. However, the invention is not necessarily limited to the stabilizing means shown in Figs. 5 and 6.

The embodiment shown isl the one selected to best delineate the invention. However, it is not necessarily limited to its precise details, but is to be limited only by the clear import of the follow# ingla'ims. Having thus described the invention, what is claimed is:

1. Apparatus for supporting a bucket and actuating the bucket door comprising av boom in-l clinable atvarious angles, a carriage traversably mounted on the boom, a bucket pivotally suspended from the carriage, bucket stabilizing means connecting the bucketv and the carriage enabling the bucket to pivot on the carriage when the inclination of the boom is adjusted and maintaining the bucket against free movement after such adiustment, a trip on the boom, tripping means mounted on the carriage engageable with the trip, means for actuating the door in response to action of the tripping means, and clutch Y mechanism engageable upon initial movement of said tripping means to couple said tripping means to said door actuating means, whereby subsequent movement of said tripping means effects actuatingY of said bucket door, said clutch mechanism being at other times disengaged, thereby permitting pivoting of the bucket relative to its carriage in response to adjustment of the boom without changingV the position of the tripping means relative to the boom trip.

2. Apparatus for Supporting a bucket and actuating the bucket door comprising a boom in; clinable at various angles, a carriage traversably mounted on the boom, a bucket pivotally suspended from theA carriage, 4bucket stabilizing means connecting the bucket and the carriage enabling` the bucket to pvot on the carpage when the inclination of the boom isadjusted and maintaining the bucket against freeV movement after such adjustment, a trip on the boom, tripping meansv for the bucket door "engageable with the trip and means for actuating the door in response to action of the tripping means said last mentionedmeans beingljourf nalledon the bucket v-pivot means'and making engagement with the door actuating means'only when the tripping means is actuated whereby the bucket may be pivoted relative to the carriage without disturbing the position of the tripping means relative to the boom trip.

3. A carriage and bucket for an inclinable boom comprising means for supporting the bucket on the carriage enabling the bucket to be adjusted whereby it may hang vertically despite the inclination of the boom, said bucket having a bottom door and mechanism for opening the same, a trip mounted on the boom, tripping mechanism mounted on the carriage engageable with the trip to cause movement thereof, means responsive to movement of said tripping mechanism to cause engagement of the tripping mechanism with the door operatingr mechanism, and means maintaining disengagement of said mechanisms when the trip is not engaged whereby the bucket may be adjusted relative to the carriage without disturbing the relation of the tripping mechanism to the boom trip.

4. A carriage and bucket for an inclinable boom comprising means supporting the bucket on the carriage enabling the bucket to be adjusted whereby it may hang vertically despite the inclination of the boom, said bucket having a bottom door and mechanism for opening the same, a shaft mounted on the carriage, a bucket door tripping member mounted on said shaft engageable with tripping means positioned on the boom, said member having a clutch face, a second member mounted on the shaft having a clutch face engageable With the clutch face of the first member, said second member being connected to the bucket door actuating mechanism, a third member mounted on the shaft having a cam face engageable with the rst member to maintain the position thereof and to cause engagement of the clutch faces when the first member is en gaged by the tripping means, whereby the bucket door is moved, and yieldable means normally maintaining said clutch faces out of engagement whereby the position of the bucket may be adjusted with respect to the boom without disturbing the position of the first member relative to the tripping means.

5. A carriage and bucket for an inclinable boom comprising a movable carriage mounted on the boom, a' bucket pivotally mounted on said carriage having a discharge door, bucket door operating mechanism connected to the discharge door of said bucket, tripping means mounted on the carriage engageable with the door operating mechanism to produce movement 'of the bucket door, and means arranged to produce engagement between the tripping means and the bucket door actuating mechanism when the tripping means is moved, said means .being inoperable when the tripping means is in one of its positions, whereby the bucket may be moved relative to the carriage without producing movement of the tripping means, and stabilizing means connecting the bucket and carriage.

RDOLPH mnnovv.

REERENCES CITED The following reference-s are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,853,545 Bushnell Apr. 1.2, 1932 2,042,388 Cogto et al May 26, 1936 2,321,073 Farrell June B, 1943 2,376,875 Honig May 29, 1945 

